Science 5 · Unit 5: Forces and magnetism · Cambridge Primary Science Stage 5

Questions

1. 1. What is a magnetic material?

   • a material that repels magnets
   • any shiny material
   • any metal
   • a material that is attracted to a magnet
   Check

2. 2. What is an alloy?

   • a mixture of metals
   • a pure metal
   • a magnet
   • a kind of plastic
   Check

3. 3. Steel is an alloy made mainly from which metal?

   • aluminium
   • iron
   • copper
   • gold
   Check

4. 4. Which alloy is made of copper and zinc?

   • stainless steel
   • steel
   • brass
   • iron
   Check

5. 5. Is a brass candlestick magnetic?

   • Yes
   • No
   Check

6. 6. Is a cast iron pot magnetic?

   • Yes
   • No
   Check

7. 7. Which metal is not magnetic?

   • steel
   • gold
   • iron
   • nickel
   Check

8. 8. Which object is made of a magnetic material?

   • an aluminium pot
   • a steel paperclip
   • a gold ring
   • a rubber glove
   Check

9. 9. What is stainless steel?

   • pure iron
   • a kind of plastic
   • steel painted silver
   • steel mixed with chromium so it does not rust
   Check

10. 10. What is the difference between a magnet and a magnetic material?

    • A magnet is never metal.
    • A magnetic material is stronger.
    • They are the same thing.
    • A magnet has an area of magnetic force around it; a magnetic material does not.
    Check

11. 11. You hold two steel paperclips together. Do they attract each other?

    • Yes, strongly.
    • No, they are magnetic materials, not magnets.
    • Only the north poles do.
    • Yes, they repel.
    Check

12. 12. How does a scrapyard magnet sort crushed cars?

    • It picks up the steel and leaves the plastic and glass.
    • It melts the plastic.
    • It picks up everything.
    • It picks up the glass.
    Check

13. 13. How could magnets help to recycle cans?

    • Magnets crush the cans.
    • A magnet picks out the aluminium cans.
    • Magnets clean the cans.
    • A magnet picks out the steel cans and leaves the aluminium ones.
    Check

14. 14. Why did Zara stroke a steel needle with a magnet to make a compass?

    • to make it sharper
    • to make it heavier
    • to turn the needle into a magnet
    • to clean it
    Check

15. 15. Why must a compass be kept away from metal objects?

    • Metal makes it rust.
    • Magnetic metals would pull the needle the wrong way.
    • It doesn't matter.
    • Metal makes it heavier.
    Check

16. 16. Why does a compass needle point north?

    • It points to the Sun.
    • The wind blows it.
    • Gravity pulls it.
    • It is attracted to the Earth's magnetic north pole.
    Check

17. 17. How can a magnet help pick up pins that have fallen on the floor?

    • Rub the floor with it.
    • It pushes the pins away.
    • Move the magnet over them - the steel pins are attracted to it.
    • Heat the pins with it.
    Check